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Class Information
Number: 181/160
Name: Acoustics > Diaphragm > With resonant chamber
Description: Subject matter including a compartment which is acoustically coupled to the diaphragm.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7165647 |
Mechanical acoustic filter by erosion etching |
Jan. 23, 2007 |
| 7155021 |
Loudspeaker having an acoustic panel and an electrical driver |
Dec. 26, 2006 |
| 7011178 |
Sound transmitter and speaker |
Mar. 14, 2006 |
| 6907955 |
Electromagnetic electroacoustic transducer |
Jun. 21, 2005 |
| 6862360 |
Speaker system |
Mar. 1, 2005 |
| 6758303 |
Electronic device having a multi-mode acoustic system and method for radiating sound waves |
Jul. 6, 2004 |
| 6628790 |
Apparatus for on-ear operation and off-ear operation with two sound reproduction transducers |
Sep. 30, 2003 |
| 6549637 |
Loudspeaker with differential flow vent means |
Apr. 15, 2003 |
| 6522759 |
Speaker |
Feb. 18, 2003 |
| 6425456 |
Hollow semicircularly curved loudspeaker enclosure |
Jul. 30, 2002 |
| 6324292 |
Speaker apparatus |
Nov. 27, 2001 |
| 6298943 |
Bass-reflex speaker assembly |
Oct. 9, 2001 |
| 6223853 |
Loudspeaker system incorporating acoustic waveguide filters and method of construction |
May. 1, 2001 |
| 6160897 |
Apparatus for operation in an on-ear mode and an off-ear mode |
Dec. 12, 2000 |
| 6062339 |
Compact spiral cavity loudspeaker enclosure |
May. 16, 2000 |
| 6031919 |
Loudspeaker system and sound reproducing apparatus |
Feb. 29, 2000 |
| 5929393 |
Speaker cabinet with sounding board |
Jul. 27, 1999 |
| 5809154 |
Ported loudspeaker system and method |
Sep. 15, 1998 |
| 5740259 |
Pressure wave transducing |
Apr. 14, 1998 |
| 5710395 |
Helmholtz resonator loudspeaker |
Jan. 20, 1998 |
| 5602367 |
Multiple tuned high power bass reflex speaker system |
Feb. 11, 1997 |
| 5550921 |
Stereo sound source for portable computer |
Aug. 27, 1996 |
| 5517573 |
Ported loudspeaker system and method with reduced air turbulence |
May. 14, 1996 |
| 5513270 |
Speaker box |
Apr. 30, 1996 |
| 5479520 |
Loudspeaker system |
Dec. 26, 1995 |
| 5475764 |
Bandpass woofer and method |
Dec. 12, 1995 |
| 5394478 |
Low frequency sound generation system for use in vehicular passenger compartments |
Feb. 28, 1995 |
| 5303209 |
Electroacoustic transducer having a partition wall and a mask wall |
Apr. 12, 1994 |
| 5261006 |
Loudspeaker system comprising a helmholtz resonator coupled to an acoustic tube |
Nov. 9, 1993 |
| 5189706 |
Acoustic apparatus |
Feb. 23, 1993 |
| 5184332 |
Multiport underwater sound transducer |
Feb. 2, 1993 |
| 5173575 |
Acoustic apparatus |
Dec. 22, 1992 |
| 5111509 |
Electric acoustic converter |
May. 5, 1992 |
| 5109422 |
Acoustic apparatus |
Apr. 28, 1992 |
| 5092424 |
Electroacoustical transducing with at least three cascaded subchambers |
Mar. 3, 1992 |
| 5073946 |
Thin speaker having an enclosure with an open portion and a closed portion |
Dec. 17, 1991 |
| 5025885 |
Multiple chamber loudspeaker system |
Jun. 25, 1991 |
| 5025474 |
Speaker system with image projection screen |
Jun. 18, 1991 |
| 5012890 |
Acoustic apparatus |
May. 7, 1991 |
| 5010977 |
Acoustic apparatus with plural resonators having different resonance frequencies |
Apr. 30, 1991 |
| 5009281 |
Acoustic apparatus |
Apr. 23, 1991 |
| 5009280 |
Acoustic apparatus |
Apr. 23, 1991 |
| 5004066 |
Acoustic apparatus |
Apr. 2, 1991 |
| 4997057 |
Method and apparatus of expanding acoustic reproduction range |
Mar. 5, 1991 |
| 4989187 |
Acoustic apparatus |
Jan. 29, 1991 |
| 4987564 |
Acoustic apparatus |
Jan. 22, 1991 |
| 4953655 |
Acoustic apparatus |
Sep. 4, 1990 |
| 4918738 |
Structural assembly for housing an acoustical system |
Apr. 17, 1990 |
| 4903794 |
Acoustical amplifying stethoscope |
Feb. 27, 1990 |
| 4875546 |
Loudspeaker with acoustic band-pass filter |
Oct. 24, 1989 |
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